Blood sugar issues since surgery...

I have not had to take metformin since surgery - my blood sugar pretty much has hovered in the 90 to 120 range fasting and post-prandial. I have been sticking to a low-carb diet with around 20-30 grams of carbs per day and I think that has helped me keep my diabetes at bay. Then last night I ate a small bowl of homemade chili with two saltines in it. I woke up during the night feeling shaky. I checked my blood sugar and it was low. I'm hoping it was just a reaction to the carbs I ate rather than a resurgance of my blood sugar issues. I think I need to stick to eating low carb - I really do feel best with that. Any diabetics out there that have had experience with blood sugar fluctuations post surgery that might be able to give me some advice?

How low was it? Had you had hypoglycemia pre-op? I know some type 2s do while others don't (I have never had a hypo episode and was diagnosed type 2 more than two years ago).